On the workload and 'phaseload' allocation problems of short reliable production lines with finite buffers

  • Authors:
  • M. I. Vidalis;C. T. Papadopoulos;C. Heavey

  • Affiliations:
  • Department of Business Administration, University of the Aegean, Chios Island, Greece;Department of Economics, Division of Business Economics, Aristotle University of Thessaloniki, GR-541 24 Thessaloniki, Greece;Department of Manufacturing and Operations Engineering, University of Limerick, Ireland

  • Venue:
  • Computers and Industrial Engineering - Special issue: Selected papers from the 30th international conference on computers; industrial engineering
  • Year:
  • 2005

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Abstract

Serial flow or production lines are modeled as tandem queueing networks and formulated as continuous-time Markov chains to investigate how to maximize throughput or minimize the average work-in-process (WIP) when the total service time and the total number of service phases among the stations are fixed (these are the workload and 'phaseload' allocation problems, respectively). This paper examines both the effect of the kind of service time distribution on the optimal workload allocation in order to maximize throughput or minimize the average WIP of perfectly reliable production lines. The new approach of this work is the differentiation of the number of service phases of the service time distribution which is assumed to be of phase type at all stations of the flow line and the placement of storage space (buffers) between any two successive stations in order to examine the effect of these factors to the form of the optimal workload vector t and the optimal service phase vector ph.